SOT-23 is the most common small SMD package for transistors (BC847, MMBT2222), small MOSFETs, diodes, and voltage references. The tiny 3-pin package is ubiquitous in modern electronics design.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Pin 1 | Varies: Base/Gate/Anode | I/O |
| 2 | Pin 2 | Varies: Emitter/Source/Cathode | I/O |
| 3 | Pin 3 | Varies: Collector/Drain | I/O |
SOT-23 is the most common small SMD package for transistors (BC847, MMBT2222), small MOSFETs, diodes, and voltage references. The tiny 3-pin package is ubiquitous in modern electronics design.